How do I test if ray intersects segment? Of triangle?

Questions
1

Hi All-

I am trying to determine whether on not mesh facets intersect. I have extracted the facet data and tried to check if the segments intersect. (I already know that the facets are in the same plane)

I tried to check for intersection by creating a ray and testing it to see if it intersects a segment specified by 2 points:

If my understanding of the documentation is correct (and it probably isn’t)
BABYLON.Ray.CreateNewFromTo(p0,p1).intersectionSegment(p2,p3,100));
should return zero and it does not.

Any thoughts? Any ideas of alternate strategies?

Thanks and best to all!

Flex

2

It’s returning the distance from the origin to the intersection point, so it’s correct :slight_smile: If it didn’t intersect it would return -1

1 Like
3

Ah, yes! So what you’re saying is that it behaves exactly like the docs say it does?

the distance from the ray origin to the intersection point if there’s intersection, or -1 if there’s no intersection

Oops :woozy_face:, Thanks, Carol.